I'm not sure. It seems to be offered by the Forest Service. It's mentioned on their website
here.
This is what they say:
General Information
Directions:
The interpretive route begins in Como, 10 miles northeast of Fairplay at the junction of US Highway 285 and Park County Road 33. However, the tour can be reversed if you are coming from Breckenridge on Summit County Road 10.
General Notes:
Download an interpretive auto tour brochure for Boreas Pass or purchase an audio CD at the South Park Ranger District in Fairplay.